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Modified myopic policy with collision avoidance for opportunistic spectrum access

Modified myopic policy with collision avoidance for opportunistic spectrum access

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Myopic policy, which maximises only immediate throughput, has been established as a simple and robust opportunistic spectrum access policy. The main drawback of the myopic policy is the lack of efficiency caused by collisions among secondary users. Secondary users do not take into account what other secondary users are doing when they attempt to transmit data packets, and there are no mechanisms to reduce collisions among them. To relieve this problem, a modified myopic policy with collision avoidance (myopic/CA is proposed). Simulation results are provided to show that myopic/CA yields better performance than the existing myopic policy.

Inspec keywords: telecommunication congestion control; radio access networks

Other keywords: collision avoidance; collision reduction; opportunistic spectrum access; data packet transmission; modified myopic policy

Subjects: Radio access systems

References

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      • Q. Zhao , L. Tong , A. Swami , Y. Chen . Decentralized cognitive MAC for opportunistic spectrum access in ad hoc networks: a POMDP framework. IEEE J. Sel. Areas Commun.: Special Issue on Adaptive, Spectrum Agile and Cognitive Wireless Networks , 3 , 589 - 600
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      • Q. Zhao , S. Geirhofer , L. Tong , B.M. Sadler . Opportunistic spectrum access via periodic channel sensing. IEEE Trans. Signal Process. , 2 , 785 - 796
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      • Y. Lee . Opportunistic spectrum access in cognitive networks. Electron. Lett. , 17 , 1022 - 1024
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      • Q. Zhao , B. Krishnamachari , K. Liu . On myopic sensing for multi-channel opportunistic access: structure, optimality, and performance. IEEE Trans. Wirel. Commun. , 12 , 5431 - 5440
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